Asphalt mastic kettles



Dec, 27, 1955 w. A. ELGETI 2,728,336

ASPHALT MAsTIc KETTLES Filed April s, 1953 2 sheets-sheet 1 AIA, .mll lh Nm Q\\\ A/ /Q N Il @WWU Afro/@N556 Dec. 27, 1955 w. A. ELGETI ASPHALT MASTIC KETTLES 1N VEN 'TOR E In BY United States Parent This invention relates to improvements in asphalt mastic kettles, and more particularly to an apparatus for eiiciently and expeditiously heating into a molten, fluent condition, asphalt mastic composition ingredients preparatory to applying the same to a oor surface or the like.

According to conventional practices, in preparing a composition for a mastic oor or the like the asphalt mastic flooring material is applied to the surface and spread while the composition is in a molten uent condition. Conventional present day practices in respect to preparing the flooring composition prior to its application are very crude and time consuming and involve the use of a heavy metal kettle ordinarily heated by a wood re and into which the asphalt and ooring mixture are deposited and mixed and heated to a fluent condition.

It isalso necessary to preheat a substantial amount of sand and granular granite which is ultimately mixed with the molten asphalt mastic material to give the latter the required body.

The present practice in respect to heating the asphalt mastic material and independently heating the sand and granite is extremely slow and time consuming, and is furthermore inetticient. Additionally, the wood fuel utilized applies heat directly to the bottom of the metal kettle with the result that the heat is localized and is .not etiiciently distributed to all interior surface portions of the kettle with the result that contents in the bottom portion of the conventional kettle will burn and cannot be used, and the burnt residue of the asphalt mastic composition must be periodically scraped from the bottom of a kettle.

With the above objects in mind, inherent in the conventional asphalt mastic kettles, a general object of the invention is to provide a practical and ecient type of asphalt mastic heating apparatus which eliminates the objections recited in connection with the conventional kettle byA substantially reducing the heating periodrequired, which permits the use of the entire contents of the kettle and which furthermore permits the preheating of sand and granite through the same heat source during the melting of the asphalt mastic composition.

A further object of the invention is to provide an improved asphalt mastic kettle or heater made up of a plurality of individually removable and replaceable sections, whichpalso provide complete access to all of the parts oi..` assemblage for repairs, m'aintenanceand cleaning. AA further o bject of the invention is to provide'an asphalt mastic kettle which is heated by means of an air-oil burner, thereby aiording controlled heat and which is furthermore arranged with heat confining and directing ducts, passages and bales to ethciently distribute heat toall portions of the upper .potV member which contains the asphalt andv mastic composition. ,1A further object of the invention is to provide an asphalt;v mastic' kettlewherein the'outer wallsof the main supporting and .enclosing frame are separated from the inner pot and heat conducting channels by insulation to prevent the dssipationoffhe'atltorthe exterior ofthe apparatus permitfort.

A further object of the invention is to provide an asphaltv mastic kettle wherein the portions which are subjected to the greatest heat and are `therefore susceptible of being"y burned out, are readily removable and replaceable.

A further object of the invention is to provide an asphalt j mastic kettle which is relatively inexpensive to manufac-'lj ture and operate, which is compact and provides ready accessibility to all portions thereof, which is neat and attractive in appearance, which is strong and durable, and which is Well adapted for the purposes described.

, spaced apart and are secured to tail hereinafter.

g main frame 10 below the lower tube 24 and inclined walls?y 22. The

In the accompanying drawings in which the same reference characters indicate the same tions broken away;

Fig. 2 is a transverse sectional view taken on line 2 2 i' of Fig. l;

Fig. 3 is a plan view on a smaller scale of the kettle.'

with the cover and pot unit removed, portions being broken away and in section;

Fig. 4 is a side view of the kettle assemblage on a smaller Y scale; and

Fig. 5 is an end view of the kettle assemblage with a'A portion of the flue or chimney broken away and with the. air-oil burner removed from the lower tube, said view also being on a reduced scale.

Referring now more will appear that the main frame of the assemblageis indicated generally by the numeral ltland the same in- 2 and 5). The side margins of the end wall 11 and the'l outer side margins of the end wall sections 12 are. se-l cured to vertical angle iron legs 15 to which are also aixed, on opposite sides of the main frame, upper and intermediate longitudinal angle iron rails 16 and 17 to' which are welded upper side plates 18. Transversely o f)4 the main frame at the upper ends thereof are en d frame welded the upper marginal Secured to the bottoms of."

angle irons 19 to which are of the end plates 11 and 12. the upright corner posts 15 are longitudinal and transverse bottom angle iron rails 20 and 21 respectively. The lower horizontal margins of the end plates 11 and 12 are` welded or otherwise secured to the bottom rails 21.

Within the main frame 1 0 intermediate the topl and bottom thereof and extending from lower marginal portions of the side walls 18 downwardly inwardly,'with' their upper margins secured to and supported onfsaid longitudinal angle iron rails 17 are walls 22 (see Fig.j2) whose adjacent inner lower margins are substantially` inner longitudinal angle members 23 which form supporting tracks for slidably receiving the horizontal side ilanges 25 on the upper'fside portions of a removable lower tube generally indicated by,` the numeral 24 and which will be described in more dei;

At this point it may be stated,-however, that said lower` tube 24 which is substantially U-shaped in cross section,: when in normal position closes the space between thelower inner margins of the inclined walls 22 and projects slightly outwardly of the opening in the right 'handV end wall (relative to Fig. l) between the end Wall s e'ctions 12. 5 "3' The numeral 26 indicates a transverse partition which separates the space within the lower open portion of the top margin of said transverse partitionv 26;".i's-

Patented. Pee ..27.1?55,.

ting workmen to ystand adjacent the apparatus with com'- lparts in all of the views;v Fig. l is a longitudinal vertical sectional View through: the improved asphalt mastic kettle, with additional por-` particularly to the drawings it.

man? 7.,

analist e assurer. asesina?? cosfofm with and engage the bottom portionsnot` theiirilinbiiiwlls'22; and intermediately, said partition has a U-shaped opening therein, .toLace; omlmoiate. the lower tube 24.

It willbe observeLdfromFigs. l and'SLtliat'theifoiwaid" 24Zhas lmounted tl'lerewithin one or" verse' saines segst sa szyh'iqh ajmjsnduy lerrantsiyj @sagst-at their esseiwrtionsf by' Slotted' brackets 33 segured on opposite inner side wall' portions of theA tube progressively longer with less spacebetw'ee'n thewlowextledges thereof andthe` bottoni wall of the lower tube. Thev bottom of the inner end df the lower tube is inelinedipwardlyLas at 34 andL carries on its inner surfajetayrshapeil baille or deector 35,

At th inner or left hand end of the interior of the nii-139. WO. (relative to lFig.4 l)` andspaced by vertical angle members 36 is the inner end wall 37 of a cradle shapeduppertube 41. )Said wall 31 has a downwardly irr'cluiii d trasverse lower portion 38 which is overlapped by laupper edgepo'rtion 'of the inclined end wall 34 of `e lwer tube 24 when the latter is in its innermost Operativas, tin 39 f ."aid Vend Wall 37 is flared inwardly, which, 4as y' peanrestricts the upward passage of heat. The opposite 'or forward end wall 43 of the cradle like upper tithe l has a* relatively centrally located rectangular i' ,44ztherein Within which is :secured the angular l: endportion `of an upwardly extending chimney 'or exhaust pipel Above the chimney entrance opening idQd wa1'1'43 is ared inwardly as at 46 for 'duct -ctpiig purposes. The Acurved bottom portion of the hped upper tubel is yformed with a longitudi- "nfg therein and secured alongthe longitudinal mfsaridopening'are angle iron( members 46 which enga'gepvr. the lupper edges ofthe mainframe rearr'ed 'It shouldpbe stated that the cradlelike upper 31 arid 312 are osition,V as shown inFig. l. The upper poi'- tt'lbe lwiththelattahedexhast pipeor'cliirrineyI 45 iS an' ral iunit which removably seats in the mainframe 10 hown, being spaced from certain wa'llportions th yby,thefang'le members described.

WS'aid 'eadlelike upper tube 41 provides an 'enclosure for"ar'er`novable' cradle shaped pot designated'g'nerally by themnuriieraly47 lwhich is normally disposed (within the upp'r'tubel in the manner shown inFigs. l and"2,`so that ,as'ubstantial'area ofthe curved bottomofsaidpot iste'rs with Yand substantially 4closes the rectangular 'p efiiig inthe bottom of the upper tubeV 41. `Thus,'the bQtmfoffthe pot is4 directlysubjected` to thehot'gas'es ilowiiiigflthrough the lower tubef24 and being deflected by tlelbaiile'sftll and 32. "Onthe curvedbottm'ov said p'pt '41,;iufs'pcedapart relation so Yas to iit exteriorly'of "lt'zovfve-r l tube top vangesI are angie Anie'n-fibei's 42. liencebetween the angle members 23 andthe respective gswl() and angle members v42 there are dened uid return ducts, and also between the upper peripheral body pprtions of the upper tube41 and the p ot47y there are spaces. hich provide for theV return of the heating fluid alongall side portions of the pot. The returning heating uidexhausts into ther space between theforwardl wall xthe upper tube and the adjacent end wallA of" the p ot and eventually is dischargedy to the atmosphere through the y:,:hirrutiey or exhaust pipe 45 which maybe controlled byv adsuitable damper 48 therein. The inner-side wallportions o., the upper' tube iticrnayh also Mcarry' longitudinal angle members 49 which serve to maintain the-spaced zontally extending. ilange relation between the adjacent wall portions'of the pot and upper' tube." It slohl'd also" bb' stated" thattlie space between the adjacent side walliportions of the upper tube 41 and the wall portions 22 and 18 of the main frame is packed with insulating material 50, preferably rock wool, to prevent the dissipation of heat to the outside of the structure.

With particular referenceto'Fig; 3, it will be observed that the right handend offv the mainframe member 10 has an inwardly extending frame structure providing a recess S1 to snugly-vertically removably. receive the angular lower end portionA of-Y theflue. or chimney 45 which extends to the adjacentendwall 43z ofthe upper tube.

The upper margin of the; upper tubez41- is formed with an angular flange 52 which seats on the angles 19 and 16 at the top of the main frame. Similarly the upper peripheral portion of the pot S3 which. seats on the upper tube ilange S2". Wlien the kettle is in operation and the. pot" 4T is'Y filled with material being cookedk or melted; the open upper end of the pot' may be kept closedl byA aY removable cover 5 4 having downturned peripheral' anges which seat on the pot flanges 53'.

The improved asphalt mastic kettle or heating appa.- ratus is, of course, portable and may be transported bytruck in either an assemlled or disassembled.' condition tol lthe point of operations. There, with a single source of heat the asphalt mastic ooring composition, as well as the required sand and granite can allI be heated and prepared simultaneously in a fraction of the time required with the conventional metallic kettle and wood fire. The lower tube y24, which contains the air-oil burners 27 has its side and bottom wall portions exposed, and initially a large body `of sand 55 is shoveled into the open framework to the right of the transverse partition 2.6 (rlaf tive to lFig. l) 'to a degree to cover the bottom and sides of the kadjacent portion of the metallic lower tube 2,4.

Similarly on "the other side of the transverse partitionv Additionally, it will be evident that thecover 54 .of .the

pot 47, wlienremoved, permits the interior of the pot to be iilled with the asphalt mastic composition which .is .to be 'cooked or 'heated 4to a 'iiuent mixed condition. The heating "uit -the material the .pot is accomplished extremelyeiciently and relatively expeditiously'becausethe structure .provides for e'ilicient heat transfer along .all majorsuifa'deA portions of the coniinedfandinsulated inner pot i47. A The ht heating Lgases are initially ,discharged finrhefnoizleZThorizbntally with considerable velocityand' areLpojecteid thef'length 'of thelowertbe 24,:.and during the course 'oftravl the'variousbales30,3131@ 32 detlect. portions of the streamito more intimate. contact with'"the bottom portion 'of 'the V.pot 47 which projects thi'bulgh fthelongitudinal openinglin the .upper .tube 41. tAt'tlielft"l1:`ir`i i end fthe'structure relativeto l 'f f3 thejhbt. gases" then rise the ductbetweenthe wal 37 an'd the' adia'centaenil'- wall 'of the'pot, and l*then are" peiiittdfto 'f'retumrtowaprd 'the exhaust end Jof -nie struc't''rein tlief passagesL dined by Ithe Lvarious l angles and ngesi and `1in f1 the spaces-#between the curved side walls-of theme'mbers l'iland f47@Shawna-most1v clearlyfin PigJZ. At the@foiwardcors'exhaustiferidtof thetstructure theseilga'ses 1 then Senter @the .L space ebetween rlthe .sfomard end walls of the members 41 and 47- ad;exhanstiinto thef-dampeiveontrolledichimneyoreirhaustipipeithrough the'openng=44. f'IItg-oilconrsegsmillmeeappreciatedfgthattthe degreeof heatsuppliedbyiaheairsoilrheatercz'lois.subject tofcontrol.

V"Infstructures;,ai this'typewhereinea'ihighrdegreexofzblt 47 is formed with a horibe necessary to replace In the present structure the portions which are subjected to the greatest degree of heat and which may, consequently, eventually burn out are the lower tube 24 and the batlles therein. It will readily be appreciated that the improved structure makes it extremely simple to replace such parts. It is merely necessary to slide the lower tube 24 out of the opening at the right hand end of the structure (relative to Fig. l), whereupon the baffles may be removably disengaged from their supporting brackets 33 and replaced, or, if desired, the entire unit 24 may be replaced.

It is also evident that other portions of the assemblage are complete units in themselves susceptible of being removed for inspection, cleaning or repairs. The pot 47 may, of course, be bodily removed from the cradlelike upper tube 41 within which it is disposed, and similarly the upper tube 41 with the attached chimney or tlue pipe may be bodily removed from the main supporting frame 10. In the latter event the insulating material 50 may be readily replaced or repacked. Preferably the pot 47 and the lower tube 24 and baffles are formed of heavy boiler plate steel to resist deterioration from excessive heat.

The efcient manner in which the improved asphalt mastic heating apparatus functions results in the proper heating and cooking of the contents of the pot 47 with the result that none of the contents of the pot is likely to burn up or deteriorate during the heating process so that the entire contents of the pot may be used without Waste and there will be no residue necessitating scraping of the interior wall portions of the pot. The preheating of the sand and granite is accomplished simultaneously with the heating of the asphalt mastic mixture by means of the same source of heat.

The improved asphalt mastic kettle is of simple sectional construction, is easy to use and operate, and processes the contained material with a substantial saving of time, and is well adapted for the purposes set forth.

What is claimed as the invention is:

l. A mastic cooker, comprising a main frame open along its lower side portions and having an intermediate floor therein inclined on both sides toward its longitudinal median, there being a relatively wide intermediate, longitudinally extending slot in said floor, an open top primary heating metallic conduit removably mounted below said floor and extending longitudinally thereof in registration with said slot, a Huid fuel burner discharging into said primary conduit, the space within said frame below the primary heating conduit being adapted to hold granular material to be heated by said primary conduit, an open top intermediate cradle member seated within the upper portion of said main frame and having a longitudinal opening in its bottom registering with the longitudinal opening in the frame oor and also having an exhaust opening in a wall, insulation between adjacent portions of the main frame and intermediate cradle member, and a cradle-shaped cooking pot spacedly seated within said intermediate cradle member and having its bottom in registration with the longitudinal openings in the main frame floor and intermediate cradle member, the spaces between the intermediate cradle member and pot being in communication with said primary heating conduit and said exhaust opening.

2. A flooring composition cooker, comprising a main frame having an intermediate, centrally tapered oor with a longitudinal slot in the central portion of said oor, said frame having upper side closures, a closed end and an apertured end, a primary heating conduit of U- shape in cross-section longitudinally slidably engaged with the marginal portions of said oor adjacent the opening and depending therefrom, said heating conduit being slidable through the aperture in the end wall for disengagement from the main frame, a fluid fuel burner discharging into an end portion of said primary conduit, an

intermediate ,cradle member removably seatedwithinfthe' having 'a :l'on"gi" bottom registering with the longi" tudinal opening in the frame door, an exhaust pipeopen-` upper portion' of said main frame and tudinal opening in its ing through an end wall portion of said .intermediate cradle member adjacent the end of thelprimary heating:

through said primary heating conduit.

3. A tlooring composition cooker, comprising a main frame having an intermediate, centrally tapered oor with a longitudinal slot in the central floor, said frame having upper side closures, a closed' end and an apertured end, a metallic, open top primary heating conduit longitudinally slidably removably engaged with the marginal portions of said floor adjacent the opening and depending therefrom, said heating conduit" being slidable through the aperture in the end wall of the main frame, battles within said primary heating t:on-v duit, a lluid fuel burner associated with and discharging into an end portion of said primary conduit, an intermediate metallic cradle member removably seated within the upper portion of said main frame and having a longitudinal opening in its bottom registering with the longitudinal opening in the frame lloor, an exhaust pipe opening through a wall portion of said intermediate cradle member, and a cradle-shaped metallic cooking pot removably nested within said intermediate cradle member and spaced from the walls thereof, the bottom of said pot registering with the longtudinal'openings in the frame iloor and intermediate cradle member.

4. A mastic cooker, comprising a main frame open along its lower side portions and having an intermediate iloor therein inclined on both sides toward its longitudinal median, there being a relatively wide intermediate, longitudinally extending slot in said iloor, an open top primary heating conduit removably mounted below said door and extending longitudinally thereof in registration i. 'ith said slot, a fluid fuel burner discharging into said primary conduit, the space within said frame below the primary heating conduit being adapted to hold granular material to be heated by said primary conduit, an open top intermediate cradle member seated within the upper portion of said main frame and having a longitudinal opening in its bottom registering with the longitudinal opening in the frame door and also having an exhaust opening in a wall, insulation between adjacent portions of the main frame and intermediate cradle member, a cradle-shaped cooking pot spacedly seated within said intermediate cradle member and having its bottom in registration with the longitudinal openings in the main frame floor and intermediate cradle member, longitudinal ribs between adjacent wall portions of the intermediate cradle member and pot, the spaces between the intermediate cradle member and pot being in cornmunication with said primary heating conduit and said exhaust opening, and a cover removably closing the top of said pot.

5. A ooring composition cooker, comprising a main frame having an intermediate, centrally tapered tloor with a longitudinal slot in the central portion of said door, said frame having upper side closures, a closed end and an apertured end, a primary heating conduit of U-shape in cross-section longitudinally slidably engaged with the marginal portions of said floor adjacent the opening and depending therefrom, said heating conduit being slidable through the aperture in the end wall for disengagement from the main frame, said primary heating conduit having staggered, inclined, removable bales therein, a fluid fuel burner mounted in the end of the primary conduit adjacent the apertured end of the main-` removably, spacedly nested within ammasso into; whichtthe burnendischarges, and a cradle-shaped cooking pot removably nested; within saidl intermediate cradle member andtspaced from. side. and end'wails thereof, the; bottomof: said pot registering with the longitudnalgopeningsf. in; the frame. floor and intermediate cradle member and b eingrheatedidirectiy by heating uidL iiowinglthrough4v said primary heating conduit.

6. Iny an asphalt mastic cooker, a main frame having anintermediate centrally inclined oor with a longitudinal slot. along its,.longitudinaimedian, tracks carried by said mainzframefadjacent its longitudinal slot, an open top cradle .member anda vcooking-pot nested within the upper portion: of. the mainframe inf spaced relation so as to provide heating fluid ductsA between adjacent bottom and side wall portionsf. of the cradle and pot, a U-shaped elongated` primary heating conduit formed with flanges alongvits uppery longitudinal margins, said anges being engaged by lti rametracks whereby saidfheatl,

conduit is; slijiailyj depended from; theA main; frame belowJ the opening therein,

said ieatihgf conduit also1 containing` u: tudnal.E opening thereinI register-ing withtheopening) inthemainf frame= whichV opening is: covered bythe` bottom portionol the potb tosubject said portionof'the pot`4 tox direct: contact withy heatinguidlpassing through ti'lepr'ii-fmaryconduit. i

Referencesf-^ited inzthe le of: this patent UNITED- STATES PATENTS Klein. Ian: 111', 187.6: Humphrey Apr; 2'5, 18M'. Robinson. Marx.. 8i 1887:' Grubitz; Mar: Si. 19041 Wylie Oct: 2=1r,1924 Littleford: May; 19,v 19361 Trauben Apr.x10;195.1

EORELGN. PAIENFIS,

Great: BritainI of 19412 

